.commentFormCover {
    width: 98%;
    max-width: 450px;
    margin: 50px auto 0 auto;
    box-sizing: border-box;
    padding: 20px;
    background: rgba(0,0,0, .03);
    font-size: 15px;
    text-align: center
}

.commentFormCover input {
    width: 100%;
    box-sizing: border-box;
    padding: 5px;
}

.commentFormCover input:first-child {
    margin-bottom: 20px;
}

.commentFormCover textarea {
    width: 100%;
    box-sizing: border-box;
    padding: 5px;
    resize: none;
}

.commentFormCover button {
    display: inline-block;
    padding: 7px;
    color: #fff;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 4px 15px 0 rgba(129, 150, 160, 0.45);
    border-radius: 5px;
    background-color: #0299ff;
    background-position: 1.35em 0.94em;
    background-size: 1em;
    background-repeat: no-repeat;
    transition: all .15s ease-in-out;
    border: none;
    cursor: pointer;
    font-size: 20px;
    margin-top: 20px;
}

.commentFormTop {
    width: 100%;
    margin-bottom: 20px;
}

@media screen and (max-width: 500px) {
    .commentFormTop {
        display: flex;
        flex-direction: column;
    }

    .commentFormCover input {
        width: 100%;
    }

    .commentFormCover input:first-child {
        margin-bottom: 20px;
    }
}